package cn.edu.ctbu.tydemo1.webapi;


import cn.edu.ctbu.tydemo1.core.PageUtils;
import cn.edu.ctbu.tydemo1.domain.Student;
import cn.edu.ctbu.tydemo1.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.*;
import org.springframework.web.bind.annotation.*;
import org.thymeleaf.util.StringUtils;


import java.util.List;

@RestController
@RequestMapping("/webapi/student")
public class StudentRestController {

    @Autowired
    private StudentService studentService;


    /**
     * 读取的url:/webapi/student/list
     * @return
     */
    @GetMapping("/list")
    public List<Student> getAll(){

        List<Student> students=studentService.findAll();

        return students;
    }


    /**
     * 分页，读取全部内容
     * @return
     */
    @GetMapping("/getbypage")
    public PageUtils getByPage(@RequestParam(value = "page",defaultValue = "0") Integer page,
                               @RequestParam(value = "size",defaultValue = "10") Integer size,
                               @RequestParam(value = "name",defaultValue = "") String name){

        //按id排倒序


        Page<Student> studentPage;

        if(StringUtils.isEmpty(name)) {
            Pageable pageable = PageRequest.of(page, size, Sort.by("id"));
            studentPage = studentService.findAll(pageable);
        }else{
            Student student=new Student();
            student.setName(name);

            Pageable pageable=PageRequest.of(0,10,Sort.by("id"));
            ExampleMatcher matcher=ExampleMatcher.matching()
                    .withMatcher("name",ExampleMatcher.GenericPropertyMatchers.contains());

            Example<Student> example=Example.of(student,matcher);

            studentPage=studentService.findAll(example,pageable);
        }



        PageUtils pageUtils= new PageUtils(studentPage.getContent(),studentPage.getTotalElements());

        return pageUtils;
    }

    /**
     *读取的url:webapi/student/get/id
     * @return
     */
    @GetMapping("/get/{id}")
    public Student get(@PathVariable Integer id){

        Student student=studentService.findById(id);

        student.setPassword("");

        return student;
    }


    /**
     * 新增学生的方法，/webapi/student/insert
     * @param student
     * @return
     */
    @PostMapping("/insert")
    public Student insert(Student student){

        Student student1=studentService.insert(student);

        return student1;

    }

    /**
     * 更新学生的方法，/webapi/student/update
     * @param student
     * @return
     */
    @PutMapping("/update")
    public Student update(Student student){

        //读取旧的数据
        Student oldstudent=studentService.findById(student.getId());

        if(StringUtils.isEmpty(student.getPassword())){
            //没有旧密码，那么就是新密码
            student.setPassword(oldstudent.getPassword());

        }

        student= studentService.update(student);

        return student;

    }


    /**
     * 删除学生的方法，webapi/student/delete
     * @param id
     */
    @DeleteMapping("/delete/{id}")
    public void delete(@PathVariable  Integer id){
        studentService.delete(id);
    }



}
